Ammonia was synthesised by

Options

A. Priestley
B. Scheele
C. Dalton
D. Raman

Explanation

**Step-by-Step Solution:**

1. **Identify the Question**: The question asks who synthesized ammonia.

2. **Historical Context**: Ammonia was discovered in 1773. The scientist associated with its discovery is Joseph Priestley.

3. **Chemical Formula**: The chemical formula for ammonia is NH₃.

4. **Naming of Ammonia**: Joseph Priestley referred to ammonia as "Alkaline Air" when he discovered it.

5. **Method of Synthesis**: Ammonia was synthesized through the reaction of hydrogen chloride (HCl) with sal ammoniac (NH₄Cl).

6. **Chemical Reaction**: The reaction between hydrogen chloride and sal ammoniac releases ammonia gas.

7. **Conclusion**: Therefore, the correct answer to the question "Ammonia was synthesized by" is Joseph Priestley.